South Korean prosecutors have charged the daughter of the chairman of Korean Air Lines with violating aviation security law and obstructing a government investigation after she caused a so-called "nut rage" incident aboard a flight.

Heather Cho, a former executive and head of in-flight service, was charged Wednesday for the December 5 incident, in which she delayed a flight and demanded the resignation of the chief steward because she was served macadamia nuts in a bag instead of on a plate.

Cho has resigned from the airline and made a public apology. She has been in court custody since December 30, after she was determined to be a flight risk or apt to destroy evidence.

Deputy chief prosecutor Kim Chang-hee told reporters Wednesday that Cho had threatened the plane's safety with her tantrum. Kim also said a current airline employee has been charged with destroying evidence and interfering with the government's investigation. A transportation ministry official was also indicted, for leaking details about the investigation.